git: openjdk/mobile: 8242472: Comment for unused PreviewFeature.Feature.TEXT_BLOCKS enum

[duke]

Changeset: b7d5172b
Author:    Jim Laskey <jlaskey at openjdk.org>
Date:      2020-04-09 16:32:22 +0000
URL:       https://git.openjdk.java.net/mobile/commit/b7d5172b

8242472: Comment for unused PreviewFeature.Feature.TEXT_BLOCKS enum

Reviewed-by: abuckley

! src/java.base/share/classes/jdk/internal/PreviewFeature.java